Cakpenteu — The Apterygota of the Seychelles. 27 



stiff cylindrical base, bearing the somewhat granulated, bladder-like extremity 

 (fig. 154 e.-yJ. 



Neither Oudemans nor Silvestri mentions the reproductive, organs of 

 Lepidocampa ; it is gratifying, therefore, to find that the Seychelles 

 specimens afford material for at least a preliminary account of them. As 

 might have been expected, they resemble rather closely those of Campodea, 

 as described and figured by Grassi ('88. pis. ivand v, figs. 46, 50) and Meiuert 

 ('65, pi. xiv, fig. 13). In the male the hinder edge of the eighth abdominal 

 sternum (fig. 154, viii) projects as a sub-triangular process, bearing series of 

 long and short bristles, and concealing the external reproductive organs. 

 These are exceedingly simple, consisting of two flattened chitinous genital 

 plates (fig. 155 g.p.) with their free edges sub-seuiicircular and bearing series of 

 bristles ; between these plates the ejaculatory duct opens, so that the whole 

 structure forms a kind of penis, as it is called by Meinert. The very short 

 median ejaculatory duct (fig. 155 d.e.) is formed by the union of paired vasa 

 defereniia {v.il.) ; its outer coat is thrown into a series of corrugations, showing 

 that the organ in the spechneu examined is in a retracted condition, the 

 retraction being brought about by the action of muscles running parallel to the 

 general direction of the tube, and originating in the abdominal exoskeleton ; 

 when extended the organ would evidently protrude beyond the hinder edge 

 of the eighth sternum. 



The female's eighth abdominal segment has the hinder edge of the sternum 

 almost straight centrally (figs. 135, 156). Beyond it project a pair of short, 

 blunt, conical processes, with a few bristles (figs. 135, 156 go) which may 

 reasonably be regarded as the gonapophyses ; the vulvar opening is between 

 these and a semicircular genital plate (fig. 156 g.p^) corresponding to the 

 dorsal plate similarly situated in tlie male. Anterior to these structures, and 

 concealed by the eighth sternum, is the slit- like spermathecal opening 

 (fig. 156 spc). 



In both sexes the hinder edge of the tenth abdominal tergum (figs. 149, 

 151) is adorned with a series of simple, bifid, and feathered bristles ; beyond 

 it projects the pointed telson (figs. 149, 150 te). I'he tenth sternum also has 

 its hinder edge beset with varied bristles ; it is deeply cleft in the middle line 

 (figs. 150, 154), each half partly concealing an acuminate a;iw2 valve (vl) 

 which bears an obliquely arranged series of papillae, whence spring long, 

 flexible bristles. External to these valves may be seen the bases of the 

 ce7xi (fig. 154 c«), which are unfortunately wanting in all the specimens 

 examined. 



The contents of the rectum are easily visible in some of the specimens, 

 and afford interesting information as to the food of Lepidocampa. They 



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